December weather forecast and climate
Clearlake Oaks, CA

Weather in December

The first month of the winter, December, is also a fresh month in Clearlake Oaks, California, with average temperature ranging between min 38.1°F (3.4°C) and max 52.7°F (11.5°C).

Temperature

With an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 38.1°F (3.4°C), December is the coldest month.

Humidity

In Clearlake Oaks, the average relative humidity in December is 72%.

Rainfall

In Clearlake Oaks, during 11.2 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, in Clearlake Oaks, there are 79.8 rainfall days, and 17.44" (443mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Clearlake Oaks, California. In Clearlake Oaks, in December, during 0.2 snowfall days, 0.08" (2mm) of snow is typically accumulated. Throughout the year, there are 1.8 snowfall days, and 0.98" (25mm) of snow is accumulated.

Daylight

With an average of 9.5h of daylight, December has the shortest days of the year in Clearlake Oaks.

Sunshine

The month with the least sunshine is December, with an average of 5.3h of sunshine.

UV index

Months with the lowest UV index in Clearlake Oaks are November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Clearlake Oaks?

With an average high-temperature of 52.7°F (11.5°C) and an average low-temperature of 38.1°F (3.4°C), December is the coldest month.

What is the temperature in December in Clearlake Oaks?

In December, in Clearlake Oaks, the average high-temperature is 52.7°F (11.5°C), and the average low-temperature is 38.1°F (3.4°C).

What is the average humidity in December in Clearlake Oaks?

The average relative humidity in December is 72%.

How much does it rain in Clearlake Oaks in December?

In December, in Clearlake Oaks, California, the rain falls for 11.2 days. Throughout December, 3.11" (79mm) of precipitation is accumulated.

How much does it snow in Clearlake Oaks in December?

In December, in Clearlake Oaks, California, it is snowing for 0.2 days. Throughout December, 0.08" (2mm) of snow is accumulated.

What is the month with the shortest days in Clearlake Oaks?

December has the shortest days of the year in Clearlake Oaks, with an average of 9.5h of daylight.

What is the average length of the day in December in Clearlake Oaks?

In December, the average length of the day is 9.5h.

What is the month with the least sunshine in Clearlake Oaks?

December has the least sunshine of the year in Clearlake Oaks, with an average of 5.3h of sunshine.

How many hours of sunshine does Clearlake Oaks have in December?

In December, the average sunshine is 5.3h.

What is the month with the lowest UV index in Clearlake Oaks?

Months with the lowest UV index in Clearlake Oaks are November and December, with an average maximum UV index of 2.

How high is the UV index in December in Clearlake Oaks?

The average daily maximum UV index in December in Clearlake Oaks is 2. A UV Index estimate of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in December
Clearlake Oaks, CA

Average temperature in December - Clearlake Oaks, CA
  • Average high temperature in December: 52.7°F

The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is December (52.7°F).

  • Average low temperature in December: 38.1°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is December (38.1°F).

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Average pressure in December
Clearlake Oaks, CA

Average pressure in December - Clearlake Oaks, CA
  • Average pressure in December: 30.11"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June and August (29.91").

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Average wind speed in December
Clearlake Oaks, CA

Average wind speed in December - Clearlake Oaks, CA
  • Average wind speed in December: 4.7mph

The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).

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Average humidity in December
Clearlake Oaks, CA

Average humidity in December - Clearlake Oaks, CA
  • Average humidity in December: 72%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (44%).

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Average rainfall in December
Clearlake Oaks, CA

Average rainfall in December - Clearlake Oaks, CA
  • Average rainfall in December: 3.11"

The wettest month (with the highest rainfall) is February (3.7").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in December
Clearlake Oaks, CA

Average rainfall days in December - Clearlake Oaks, CA
  • Average rainfall days in December: 11.2 days

The month with the highest number of rainy days is March (13.9 days).
Months with the least rainy days are July and August (1.1 days).

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Average snowfall in December
Clearlake Oaks, CA

Average snowfall in December - Clearlake Oaks, CA
  • Average snowfall in December: 0.08"

The month with the highest snowfall is February (0.51").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Clearlake Oaks, CA

Average snowfall days in December - Clearlake Oaks, CA
  • Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is February (0.9 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Clearlake Oaks, CA

Average daylight in December / Average sunshine in December - Clearlake Oaks, CA
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.3h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in December
Clearlake Oaks, CA

Average sunshine days in December - Clearlake Oaks, CA
  • Average sunshine days in December: 19 days

The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (15.8 days).

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Average UV index in December
Clearlake Oaks, CA

Average UV index in December - Clearlake Oaks, CA
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 7).
Months with the lowest UV index are November and December (UV index 2).

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Average cloud cover in December
Clearlake Oaks, CA

Average cloud cover in December - Clearlake Oaks, CA
  • Average cloud cover in December: 41

The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in December
Clearlake Oaks, CA

Average visibility in December - Clearlake Oaks, CA
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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